<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>if-else</title>
		<script type="text/javascript">
			let ht_score = 99;
			let music = 68;
			if((ht_score >= 90 && music >= 80) || (ht_score>=100 && music>=70)){
				document.write("真不错！！！");
			}else {
				document.write("该努力了！！");
			}
		</script>
	</head>
	<body>
	</body>
</html>